Lefoo I-electromagnetic Flowmeter

I-electromagnetic flowmeter iyithuluzi lokulinganisa uketshezi oluqhubayo olwenziwe ngokomthetho kaFaraday wokungeniswa kwe-electromagnetic.

I-electromagnetic flowmeter inochungechunge lwezici ezinhle kakhulu, okungaxazulula izinkinga ezinye izigeleza akulula ukuzisebenzisa, njengokulinganiswa kokugeleza okungcolile nokugeleza okuwohlokayo.

Ngawo-1970 kanye nawo-1980, kwaba nentuthuko enkulu kubuchwepheshe bokugeleza kagesi, okwenza kube uhlobo olusetshenziswa kabanzi lwe-flowmeter, futhi iphesenti lokusetshenziswa kwayo kumamitha wokugeleza liqhubekile nokukhuphuka.

Isibuko sokusebenzisa

Ama-electromagnetic flowmeter anezinhlobonhlobo zokusebenza, nezinsimbi ezinobukhulu zisetshenziswa kakhulu kumaphrojekthi wokuphakelwa kwamanzi nawokuhambisa amanzi; ama-calibers aphakathi nencane avame ukusetshenziswa ezifunwa kakhulu noma ezinzima ukulinganisa, njengokulawulwa kwamanzi okupholisa isithando sokuqhuba isithando somlilo embonini yensimbi nensimbi, Isilinganiso sepulp notshwala olumnyama embonini yamaphepha, kanye nemboni yamakhemikhali. Uketshezi olunamandla, i-ore pulp embonini yensimbi engeyona i-ferrous; ubukhulu obuncane kanye ne-micro-diameter kuvame ukusetshenziswa ezindaweni ezinezidingo zokuhlanzeka ezifana nemboni yemithi, imboni yokudla, kanye ne-biochemistry.

Izici Zomsimbi

1. Isilinganiso asithinteki izinguquko zobuningi obuketshezi, i-viscosity, izinga lokushisa, ingcindezi nokuqhuba;

2. Azikho izingxenye zokugeleza eziphazamisayo kushubhu lokulinganisa, akukho ukulahleka kwengcindezi, nezidingo eziphansi zezigaba zamapayipi eziqondile. Ukuzivumelanisa okuhlukile kusilinganiso se-sdrurry;

3. Ukukhethwa okunengqondo kwezinzwa nezinto ze-electrode, okungukuthi, ukumelana okuhle kokugqwala nokumelana;

4. Isiguquli samukela indlela yenoveli yokujabulisa, ngokusetshenziswa kwamandla aphansi, iphoyinti elizinzile elizinzile kanye nokunemba okuphezulu. Ibanga lokugeleza lingafinyelela ku-150: 1;

5. Isiguquli singahlanganiswa noma sihlukaniswe nenzwa;

6. Isiguquli samukela i-micropressor esebenza nge-16-bit, isibukiso se-2x16LCD, ukusethwa okulula kwepharamitha kanye nohlelo oluthembekile;

7. I-flowmeter uhlelo lokulinganisa lwezindlela ezimbili olunama-totizer amathathu akhiwe ngaphakathi: phambili inani, ukubuyela emuva okuphelele nokwehluka okuphelele; ingakhombisa ukugeleza phambili nokubuyela emuva, futhi inokukhipha okuhlukahlukene: okwamanje, I-pulse, ukuxhumana kwedijithali, HART;

8. Isiguquli samukela ubuchwepheshe be-back mount (SMT), ngemisebenzi yokuhlola nokuzihlola;

9. Ukunemba kokulinganisa akuthintekiwe yizinguquko zobuningi obuketshezi, i-viscosity, izinga lokushisa, ingcindezi nokuqhuba. Isignali yenzwa eyenziwe nge-voltage inobudlelwano obuqondile nezinga lokugeleza okumaphakathi, ngakho-ke ukunemba kokulinganisa kuphezulu.

10. Akukho ukuvinjelwa kwepayipi lokulinganisa, ngakho-ke akukho ukulahleka kwengcindezi okwengeziwe; azikho izingxenye ezihambayo kwipayipi lokulinganisa, ngakho-ke inzwa inempilo ende kakhulu.

11. Njengoba isignali ye-voltage eyenziwe yakhiwa kuyo yonke isikhala esigcwele inkambu kazibuthe futhi inani elijwayelekile ebusweni bepayipi, isigaba samapayipi eqondile esidingwa yinzwa sifushane, futhi ubude buphindwe ka-5 ububanzi bepayipi.

12. Isiguquli samukela i-chip microcomputer eyodwa yamuva futhi ethuthuke kakhulu (MCU) nobuchwepheshe besimo saphezulu (SMT) emhlabeni, ngokusebenza okuthembekile, ukunemba okuphezulu, ukusetshenziswa kwamandla aphansi, iphoyinti elizinzile le-zero nokusethwa kwepharamitha elula. Chofoza ku-LCD yokubonisa i-China ukubonisa ukugeleza okuhlanganisiwe, ukugeleza okusheshayo, isilinganiso sokugeleza, amaphesenti wokugeleza, njll.

13. Uhlelo lokulinganisa ngezindlela ezimbili, olungalinganisa ukugeleza phambili nokugeleza okubuyela emuva. Ukusetshenziswa kobuchwepheshe obukhethekile bokukhiqiza kanye nezinto ezisezingeni eliphakeme kuqinisekisa ukuthi ukusebenza komkhiqizo kuhlala kuzinzile isikhathi eside.

Indlela elungile yokukhetha yezinto zokugweba i-electromagnetic flowmeter.

Izinto zokugcina kufanele zikhethwe ngokuya ngokonakala, ukubhubha nokushisa kwendlela elilinganisiwe:

1. Injoloba yemvelo (injoloba ethambile)

(1) Ukuqina okuhle, ugqoke ukumelana namandla okudilizaya

(2) Ukumelana ne-asidi ebuthakathaka ejwayelekile nokugqwala kwe-alkali buthakatha

(3) Ukulinganisa amanzi nendlene

2. Injoloba yokumelana ne-acid (injoloba eqinile)

Ukumelana nokugqwala kwe-hydrochloric acid, i-acetic acid, i-oxalic acid, i-ammonia amanzi, I-phosphoric acid ne-50% sulfuric acid, i-sodium hydroxide, i-potassium hydroxide ekushiseni kwegumbi, kodwa hhayi ukumelana nokugqwala kwama-oxidants aqine

Ukulinganisa i-asidi ejwayelekile, i-alkali nesisombululo sikasawoti.

3. I-Neoprene

Linganisa amanzi, indle, udaka nezinsimbi

(1) Ukuqina okuhle kakhulu, amandla aphezulu okuphuka, ukumelana okungcono kokugqoka

(2) Iyamelana nokugqwala yizixazululo ezijwayelekile ze-acid-base kanye nosawoti, kepha ayimeni nokugqwala yimidiya ye-oxidative

<80℃;

4. Injoloba yePolyurethane

Isilinganiso samalahle angathathi hlangothi futhi angaphethe kakhulu, ama-sdrury nama-orery

(1) Ukumelana okuhle

(2) & nBsp; I-acid embi ne-alkali

<40 ℃

5. Polytetrafluoroethylene (PTFE)

Isilinganiso sokugxila, isixazululo esinamandla sokubola i-alkali kanye nengcwele

(1) Ukumelana nokubilisa i-hydrochloric acid, i-sulfuric acid, i-nitric acid, i-aqua regia, i-alkali egxile kanye nama-solvents ahlukahlukene we-organc

(2) Ukugqoka okuhle nokunamathela kabi

-80 ~ 180℃;

Indlela yokufaka

Ama-electromagnetic flowmeter asetshenziswa kabanzi kwendle, ikhemikhali ye-fluorine, amanzi okukhiqiza, imboni yamanzi yompompi, imithi, insimbi nezinye izici eziningi. Ngenxa yesimiso, ingalinganisa kuphela uketshezi lokuqhuba. Yize ingcono kakhulu kunezinye izinhlobo zama-flowmeter ngokwethembeka nokuzinza, Amakhasimende asazohlangabezana nezinkinga ezithile enqubweni yokusetshenziswa kwangempela. Ake ngichaze ngokuningiliziwe ukukhethwa nokufakwa kwamametera kagesi:

Okokuqala, njengamanye ama-flowmeter, yize i-electromagnetic flowmeter inesilinganiso sebanga lokulinganisa esingu-30: 1, okuphakeme kunaleso se-vortex flowmeters kanye nokugeleza kwengcindezi okuhlukile, nakho kunqunyelwe. Ukuyiqhathanisa nemitha yamanzi, kucatshangwa ukuthi ingalinganisa isilinganiso sokugeleza esiphansi kakhulu. Ngaphansi kwezimo ezijwayelekile, ingalinganisa kuphela u-0.1 m / s. Kunzima ukuthi i-electromagnetic flowmeter ilinganisa kahle ngaphansi kwaleli zinga lokugeleza. Ngakho-ke, kuyadingeka ukucacisa isilinganiso sebanga lokugeleza esigabeni sokuqala soku-oda. Lapho ku-oda, akunakwenzeka uku-oda ngokuya ngobubanzi bepayipi langempela, kungcono ukunquma ububanzi bensimbi ngokuya ngokugeleza kwakho kwangempela.

Okwesibili, njengamanye ama-flowmeters, ama-electromagnetic flowmeter nawo anezidingo zamapayipi aqondile ngaphambi nangemva kokufakwa, kepha zinezidingo eziphansi kunezinye izinhlobo zama-flowmeter, kepha iphuzu elibaluleke kakhulu ukuhlangabezana nayo: okungukuthi, ipayipi ligcwele, bese ipayipi ligcwele. Lapho ipayipi lingagcwalisi, kulula ukudala ukuthi i-flowmeter igxume ngokungahleliwe:

Okwesithathu, njengamanye ama-flowmeters, ama-electromagnetic flowmeter nawo anezinga lokuvikela. Ngokuvamile, izinga lokuvikela elihlanganisiwe yi-IP65, kanti uhlobo oluhlukanisiwe yi-IP 68 (yezinzwa). Uma ikhasimende linezidingo zemvelo yokufakwa kwensimbi, indawo yokufaka ingaphansi komhlaba. Emithombo noma kwezinye izindawo ezimanzi, kunconywa ukuthi amakhasimende akhethe uhlobo oluhlukanisiwe. Ukuze kugweme ukulimala kwensimbi ngenxa yokukhethwa okungalungile.

Okwesine, i-electromagnetic flowmeter ingalinganisa uketshezi olubolayo, kepha ekuqaleni kwe-oda, ikhasimende kufanele linikeze ngokufanele ezinye izakhiwo zokulinganisa, ukuze kugweme amaphutha ekukhethweni kwe-electrode ngesikhathi sokukhethwa, okuholela ekutheni inzwa isuswe enqubweni yokusetshenziswa kamuva, Ukuletha ubunzima kumakhasimende nokulahlekelwa kwezomnotho.

Okwesihlanu, yize i-electromagnetic flowmeter inokuthembeka okuhle futhi ngeke ilimaze ngaphansi kwezimo ezijwayelekile, ngenxa yesimiso sayo, indawo ye-electrode yenzwa ibixhumana noketshezi. Ngemuva kwesikhathi eside, indawo ye-electrode kungenzeka kakhulu ukuthi ingcoliswe. Ngakho-ke, ngokuvamile, lapho i-electromagnetic flowmeter ichithwa yikhasimende, kunconywa ukuthi i-electrode isuswe futhi ihlanzwe kanye ngonyaka kuye eminyakeni owodwa nohhafu ukuqinisekisa isilinganiso ukunemba kwemitha yonke yokugeleza. Noma iyiphi insimbi idinga "ukugcinwa", futhi ama-electromagnetic flowmeter awahlukile.

Okwesithupha, lapho umugqa omkhulu uyipayipi eliqonde mpo, ngaphansi kwezimo ezijwayelekile, ukugeleza kwamanzi kuyadingeka ukuthi kube phansi, futhi uzame ukungabi phezulu phansi. Lesi sakamuva kungenzeka sidala ukuguquguquka okukhulu kokugeleza. Ngaphezu kokufakwa kwamapayipi agcwele, lokhu futhi kubaluleke kakhulu, kulandelwe ibanga eliphakathi kwamapayipi angaphambili nangemuva.

Khetha indawo elula ukuyigcina futhi elula ukuhamba. I-flowmeter kufanele ifakwe ekugcineni ngemuva kwepompo, ingalokothi ohlangothini lwe-sunction; i-valve kufanele ifakwe ohlangothini olungezansi lokugeleza.